In more detail, on each turn either you use the multiple tiles of your chosen fantasy race to (normally) occupy adjacent territories, possibly defeating weaker enemy races along the way, or you give up on your race and let it go into decline. A race in decline is designated by flipping the tiles over to their black-and-white side. At the start of the game or after you go into decline, you choose a new race/power combination at the start of your turn, with the 16 races and 20 powers being paired randomly each game.
At the end of your turn, you score one coin for each territory your races occupy. You may have one active race and one race in decline on the board at the same time. Your occupation total can vary depending on the special abilities of your race and the territories they occupy. After the final round, the player with the most coins wins.